Cam strip



July 9, 1957 y s. E. DlBB 2,798,327

CAM STRIP File-d 11219.18, 1955 Q ,f 7 nl 3 l 3 i 1Q?. 5' INVENTOR.

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ATTE R N EYS United States Patent() CAMrSTRIP Samuel E. Dibb, Bogota, N. J.

Application February'lS, 1955, Serial No.489,214

6 Claims. (Cl. 40-156) This invention relates to picture frames and particularly holding devices for retaining the glass, picture, and backing in a frame, and in particular, spaced cams having sharp edges pivotally mounted on an adhesive strip and positioned on a backing whereby with the cams in released positions the parts are adapted to be removed from the frame and with the cams actuated to gripping relation with the frame the glass, picture, and backing are clamped in the frame.

The purpose of this invention is to provide holding means for retaining the glass, picture, and backing member in a picture frame whereby the parts are adapted to be removed and replaced.

With the conventional method of securing the glass, picture, and backing in a picture frame with nails driven into the frame, the parts readily work loose and after removing and replacing the nails several times they become bent and openings in which the nails are positioned worn to such an extent that it is diflicult to retain the parts in the frame. Withl this thought in mind, this invention contemplatesreplacing the nails with small cams having sharp edges that bite into the material of the picture frame whereby it is only necessary to turn the cams to gripping relation with the frame to secure the parts in position in the frame.

Ilhe object of this invention is, therefore, to provide means for clamping a glass, picture, and backing in a picture frame without the necessity of driving nails into the frame.

Another object of the invention is to provide a device for clamping the glass, picture, and backing in a picture frame wherein wear developing in the parts is readily taken up so that the parts may be firmly gripped throughout the life of the frame.

Another important object of the invention is to provide means for clamping the elements of a picture frame in position in which the clamping means is adapted to be used in frames now in use.

A further object of the invention is to provide means for clamping the glass, picture, and backing member in a picture frame in which the clamping means is adapted to be cut with a pair of scissors, or the like, to correspond with frames of dilferent sizes.

A still further object of the invention is to provide means for rigidly clamping the members of a picture frame in position in which the clamping means is of simple and economical construction.

With these and other objects and advantages in view, the invention embodies an adhesive strip adapted to be cut to fit the opening of the back of a picture frame, cams having handles extended therefrom and having sharp edges on gripping porions thereof, and eyelets extended through the cams and adhesive strip for pivotally mounting the cams on the strip with the cams positioned to extend beyond an edge of the strip in use.

Other features and advantages of the invention will appear from the following description, taken in connection with the drawing, wherein:

2,798,327 Patented July 9, 1957 Figurefl is afplan view of an adhesive strip showing gripping cams in spaced relation-thereon and hollow rivets extended through the cams and adhesive Astrip for pivotally mounting the cams on the strip:

Figure 2 is a rear elevational v iew of a picture frame showing a backing member retained by cams on adhesive stripsin the opening in theback-of the frame.

Figure -3 is a crosssection through theadhesive strip with'thepartssh'own 'on-an enlarged scale, taken online `Zi--sfof-Figure 41, and showing'one'of the'cams pivotally 3, looking upwardly toward the underfsurface of one of the cams and with Vthe tubular *rivet for holding the cam on the adhesive strip shown in section.

Figure 5 is a cross section through the adhesive strip, somewhat similar to that shown in Figure 3, the cam Ithereon being shown in elevation.

Referring now to the drawing, wherein like reference characters denote corresponding parts, the improved cam strip of this invention includes circular cams 10 having handles 11 extended from one side, an adhesive strip 12 and hollow rivets 13 extended through the cams and adhesive strip and secured in position by anges 14 and 15 formed by peening over ends of the rivets, as shown in Figure 3.

In the design shown, the cams 10 are circular and a peripheral edge, extended from a point 16 at one side of the handle 11 to a point 17 at the opposite side, is beveled providing an inclined surface 18 and a sharp edge 19, the edge 19 being adapted to bite into an inner surface 20 of a frame 21 with the adhesive strip positioned on a backing member 22, as shown in Figure 2.

The ends of the handles 11 of the cams are provided with knobs 23 by which the cams may be rotated or turned on the rivets to urge the edges 19 into the material of the frame or to release the cams from the frame.

The adhesive strips 12 are provided in suitable lengths and, in using the device in a picture frame, ends of a section of a strip are cut, such as on diagonal lines 24 and 25, and, with the ends of strips, such as strips 26 and 27 at the ends of the frame, cut on similar lines, meeting edges will be positioned at corners of the frame. An additional section of ya strip, such as the section 28, may also be provided at the opposite side of the frame whereby with the strips or sections thereof assembled on the backing member 22 a complete clamping panel is provided and, with the panel positioned against a picture behind a glass front, the picture and gl-ass may be rigidly clamped in position in the conventional recess of a picture frame.

The strip and cams may be made of plastic or other suitable material.

It will be understood that modiiications, within the scope of the appended claims, may be made in the design and arrangement of the parts without departing from the spirit of the invention.

What is claimed is:

l. A cam strip for retaining elements in a picture frame comprising a strip of material having adhesive on one side, cams having sharp edges, and means for pivotally mounting the cams on the strip of adhesive material whereby sharp edges of the cams are adapted to extend beyond an edge of the strip of material.

2. A strip of adhesive material adapted to be attached to an edge of a backing member of a picture frame and a cam pivotally mounted on said strip and positioned to be actuated to grip the picture frame with the backing member in position in the recess in the back of the frame.

3. A picture frame clamping device comprising a strip of adhesive material, cams having sharp edges,

and means for pivotally mounting the cams in spaced relation on the strip of adhesive, the cams being positioned to extend beyond an edge of said strip.

4. A strip of material having -an adhesive on-one'side,

cams positioned in the side of the strip of materialopposite to that on which the adhesive is positioned, and means pivotally mounting the cams in spaced relations 'on said vsaid strip and with portions of the cams adapted to extend beyond an edge of the strip. Y

6. In a holder for use in a picture `frame having an opening therethrough and having a recess positioned in the back and extended around said opening, a strip of material having an adhesive surface on one side adapted to be mounted on a backing member of said picture frame, a plurality of cams having circular portions with sharp beveled edges and handles with `knobs thereon extended from the circular portions, and tubular rivets extended through the strip of material and circular portions of the cams for pivotally mounting the cams on said strip of material, and said rivets being positioned whereby the sharp beveled edges are adapted to extend beyond an edge of said strip of material.. s

References Cited in the le of this patent UNITED STATES PATENTS 99,854 Crocker Feb. 15, 1870 1,222,468 Rosen Apr. 10, 1917 Rado July 25, 1950 

